Lock.



No. 874,793. PATENTED DEG? 24, 1907. W. s. ROBINSON.

LOOK.

APPLICATION FILED SEPT. 3.190

2 SHEETS-SHEET 1.

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PATENTED 13mm, 1907.

Non 874,793.-

W. S. ROBIN SON.

LOOK. APPLIOATION FILED SEPT. 8,1907.

2 SHEETS-SHEET 2.

INVENTOR t l Ailarney U ITED-sures PATENT onnron.

WELLINGTON s. noB NsoN, or CHICAGO, ILLINoIs, ASSIGNOR TO THE YALE & TOWNE MANUFACTURING coMPANY, or STAMFORD, oo NncTIoUT.

, oon.

Specification of- Letters Patent.

Patented Dec. 24:, 1907.

' I Application filed, September 3,1907. Serial No. 391,167.

To izll'whom it may concern: f

' Be it known that I, WELLINGTON S, RoB- INSON, of Chicago, in the county of Cook and State of Illinois ,have invented certain new and useful Improvements in Locks and I do 'hereby declare. the following-to be a full,

clear, and exact description of the-invention,

such as will, enable others skilled in the art to. which it 'appertains to make and use the same. 4

' My invention relates to an improvement in looks adapted particularly for use on exit doors oftheaters, halls, etc. theobject being to provide means-wherebyin the case of, a

panic, or desire on the part of those on the inside to st out,;the lock'bolt may be retracted and tiedoor swung o" ed, by pressure applied to a yielding mem er on. theinner face of the door.

With this end in view my invention consists in a bolt, kno'bi-rnechanism for actuating same, and a swinging- )late mounted on the nner-facegof the doc and adapted when forced toward .the door, to retract the locking bolt and release the door, thuspermitting: the latter to swing open.

' My invention further consists in the parts and combinations of parts as will be more fully explained and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in vertical section through a section of .a door with my-1mproved lock thereon.

Fig. 2 is a view in elevation of a portion of the j door 'showin the swinging plate and Fig. 3 1s a VlGW in e evation of the lock the cover plate being removed.

While I have shown block having a single bolt, I, m'ay employ two or three bolts, in

which event the several bolts would be con nected by levers or other devices so as to be actuated in unison.

1 represents lock case adapted to be secured within a mortise in the edge of a door. 2 is the outer escutcheon plate carrying a pin tumbler or cylinder lock 3 and a knob 4,

the spindle 5 of which carries the roll back 6.-

Mounted on stud 7 carried by the roll back, is the linkS, the'lower end of which. carries a stud 9 resting-in the elongated slot 10 in bolt carrying member 11. The bolt 12, shown in Fig. 1', is secured in a socket 13 in the lower end of member 11 and projects downwardly to the lower end of the door and engages a keeper secured to the door sill.

"The upper end of member 11 is provided with an elongated slot 14 through which the knob spindle 5 passes, which slot together with the slot-in the lower end of the lock case 1, guides the member 11 and bolt 12 in their vertical movements.

With the'construction of parts thus ardescribed it will be seen that the weight of the bolt tends to keep the latter in its locking position, the elongated slots in the member 11 permitting of movement of the bolt in dependently of the knob mechanism. By rotating the knob, the roll back 6 will be turned, thus lifting'link 8; this upward movement'of-link 8 causes stud 9 to engage the upper .wallof slot 10 in member 11, thus elevating the latter and the bolt 12 carried thereby.

In order to lock the knob, which is on the deadlocking slide 15, actuated by. the pin tumbler or cylinder lock 3. This slide 15 is suitably mounted in the lock case 1, and is provided with two lips 16' and 16, the former of which is engaged by the arm 17 on the hub or barrel of the lock 3, when the latter is turned in a direction to move the slide toward the roll back, and the lip 16 is engaged by the arm 17 when the latter is turned in a direction to move the slide away from the roll back. Located intermediate the lips 16 and 16 is the tongue 17, on the tumbler 18, which latter is carried by the slide 15 and held in the position shown in Fig. 3 by the spring 19. When in the position shown, a shoulder on the tumbler is in engagement accidental movement when not in. engagement withtheroll back. The slide is provided with the toe 2O which latter is adapted'to enter the recess 21 in the roll back and lock the latter against movement. One recess 21 is located in a position to deadlock the bolt in its locked position and the other is ninety degrees removed, so that when the roll back is given a quarter turn this second recess is brought into position to register with the toe and thus deadlock the bolt in its retracted position.

With this look, the cylinder or pin tumbler lock sim ly operates to dead lock the knob mechanism, the latter being the sole means for retracting the bolt from the out- S1 e.

Secured to the inner face of the lock stile outside of the exit door, I have provided-the with a lug 20, which holds the slide against its lower end withthe pivoted bell crank lover 23', one'end 24'of-which rests within a slot 25 in the bolt and eng'ages the upper wall of said slot, While the outer member 26 of said lever 23, is engaged by shoulder 27 on the inner faceof plate 28 hinged at its upper end to the frame 29. As the lever 23 is in the form of a 'bell crank lever, and is fulcrumed. intermediate its ends, it will be seen '10 that when the plate 28 is forced, or swung in- V ,panic or stampede in'a theater or other hall,

a ressure against the plate 28 automatically withdraws all the bolts and opens the door.

The lock" may havea bolt to engage a keeper in an adjacent swinging door, consequently by retracting the bolts as above ex lained both doors will be free to open.

. ith this look the doors may be safely locked against entrance except by the use of the proper key, and always bein a condition 30 to be automatically unlocked by a pressure ap lied. to the swinging plate 28.

t is evident that many slight changes might be resorted to in the relative arrangement of parts shown and described without departinglfr'om the spirit and scope of my invention that I do not wish to confine myself to the exact construction of pants shown and described, but,

40 Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is

1. The combination with a bolt, outside a mechanism for retracting same and means for doggin the latter, of a yielding means secured to't .e inner face of the door and deence I would have it understood' vices connecting the bolt and said yielding means, whereby when ressure is applied to the latter the bolt will e ret-racteds 2. The combination with a bolt, mechan- 3. The combination with an outside knob,

knob mechanism and a bolt, the latter having a free movement independent of the knob mechanism, of a yielding device exposed at the inner side of the door and means connecting said bolt and yielding device, whereby when pressure is applied to the latter the bolt will be retracted.

4. The combination with a door, outside means for retracting the bolt, means for deadlocking said outside means and a bolt Z0 actuated by the latter, eta plate ,-hinged to the inner face of the door and means connect ing said plate and bolt, whereby ,Whenpressure is applied to the former, the bolt wlll be retracte '75 5. The combination with a door, outside means for retracting a bolt, means for deadlockirig said outside means and. a bolt'actuated by the latter, of a plate hinged at its'upper end to the inner face of the door, and a so pivoted lever engaging the inner face of the inged plate and the bolt, whereby when the plate is swung toward the door, the bolt Will e retracted.

In testimony whereof; I have signed this v specification in the presence of two subscribing witnesses.

WELLINGTON S. ROBINSON.

Witnesses: w

RICHARD E. GEDNEY, R. J. KLEINSMID. 

